"Following the explosion, an intense fire began, destroying the building completely," said Viktor Beltsov, a spokesman for the local emergencies service office. "Following the blaze, firefighters pulled 10 people from beneath the ruins."

The blast occurred in the 500-square-foot Yantarnoe Cafe in the Severnii market about 10:15 p.m. Moscow time and the hour-long fire that ensued consumed the building.

The town of Orsk is located in the Urals region of Orenburg about 800 miles southeast of Moscow.